
\documentclass[12pt]{amsart}
\usepackage[utf8]{inputenc}
\usepackage{geometry} % see geometry.pdf on how to lay out the page. There's lots.
\geometry{a4paper} % or letter or a5paper or ... etc
% \geometry{landscape} % rotated page geometry

% See the ``Article customise'' template for come common customisations

\title{}
\author{}
\date{} % delete this line to display the current date

%%% BEGIN DOCUMENT
\begin{document}

\maketitle
\tableofcontents

\section{}
\subsection{}

\begin{table}[ht] 
\caption{Nonlinear Model Results} % title of Table 
\centering % used for centering table 
\begin{tabular}{cccc} % centered columns (4 columns) 
\hline\hline  %inserts double horizontal lines 
Case & Method\#1 & Method\#2 & Method\#3 \\ [0.5ex] % inserts table 
%heading 
\hline % inserts single horizontal line 
1 & 50 & 837 & 970\\ % inserting body of the table
2 & 47 & 877 & 230\\
3 & 31 & 25& 415\\
4 & 35 & 144 & 2356 \\
5 & 45 & 300 & 556 \\ [1ex] % [1ex] adds vertical space 
\hline %inserts single line 
\end{tabular} 
\label{table:nonlin} % is used to refer this table in the text 
\end{table}

\end{document}
